2020 Fiscal Year Final Research Report
Study of plankton community structure by environmental DNA metabarcoding under red soil pollution
| Project/Area Number |
18K18203
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 63040:Environmental impact assessment-related
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
Ares Angela 沖縄科学技術大学院大学, 海洋生態物理学ユニット, 研究員 (30817549)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | ecotoxicology / marine microbiology / red soil pollution / coastal pollution |
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| Outline of Final Research Achievements |
Climate change scenarios predict more frequent and intense tropical storms which will increase the amount of terrestrial run-off affecting coastal ecosystems. Bacteria are key contributors to the ecosystem, but little is known about how they respond to storm events. In this project, we combined field and mesocosm observations to assessed bacterial community dynamics and changes in physicochemical properties during early- and late-season tropical typhoons under Red Soil Pollution in Okinawa. Storms caused large and fast influxes of soil runoff and caused increases of macronutrients. We detected shifts in relative abundances of marine and terrestrially derived bacteria, including putative coral and human pathogens, during storm events. The storm effects were short-lived but the early- and late-season storms caused different physicochemical and bacterial community changes, demonstrating the context-dependency of extreme storm responses in a subtropical coastal ecosystem
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| Free Research Field |
environmental science
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| Academic Significance and Societal Importance of the Research Achievements |
Red Soil Pollution contributed to the coral reefs degradation in Okinawa, and hence an important impact in fisheries and tourism. This project provided insights into prokaryote responses to RSP and their potential to be used as bioindicators to be used as an easy and efficient environmental tool.
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